Question 1

Dot plots may not reveal the shape of a distribution when the sample is small.

Accepted Answer

A) True 
 B)False  True

Question 2

Which is not a tip for effective line charts?

Accepted Answer

A)  Line charts are better than bar charts to display cross-sectional data. 
B)  Numerical labels are omitted on a line chart if there are many data values. 
C)  Omit data markers (e.g. ,squares,triangles)when there are many data values. 
D)  Thick lines make it harder to see exact data values. 
A)  Line charts are better than bar charts to display cross-sectional data. 
B)  Numerical labels are omitted on a line chart if there are many data values. 
C)  Omit data markers (e.g. ,squares,triangles)when there are many data values. 
D)  Thick lines make it harder to see exact data values. A

Question 3

A pie chart can generally be used instead of a bar chart.

Accepted Answer

A) True 
 B)False  False

Question 4

A population has 75 observations.One class interval has a frequency of 15 observations.The relative frequency in this category is:

Accepted Answer

A)  0.20. 
B)  0.10. 
C)  0.15. 
D)  0.75. 
A)  0.20. 
B)  0.10. 
C)  0.15. 
D)  0.75.

Question 5

It is easier to read the data values on a 3D column chart than on a 2D column chart.

Accepted Answer

A) True 
 B)False

Question 6

Below is a sorted stem-and-leaf diagram for the measured speeds (miles per hour)of 49 randomly chosen vehicles on highway I-80 in Nebraska.The modal class is:

Accepted Answer

A)  60 but less than 70. 
B)  70 but less than 80. 
C)  80 but less than 90. 
D)  impossible to determine. 
A)  60 but less than 70. 
B)  70 but less than 80. 
C)  80 but less than 90. 
D)  impossible to determine.

Question 7

An open-ended bin (e.g. ,"50 and over")might be seen in a frequency distribution when:

Accepted Answer

A)  some data values are not integers. 
B)  data values are non-numerical. 
C)  extremely large data values exist. 
D)  some data are missing. 
A)  some data values are not integers. 
B)  data values are non-numerical. 
C)  extremely large data values exist. 
D)  some data are missing.

Question 8

Excel's pyramid chart is generally preferred to a bar chart.

Accepted Answer

A) True 
 B)False

Question 9

Which is a reason for using a log scale for time series data?

Accepted Answer

A)  It helps compare growth in time series of dissimilar magnitude. 
B)  General business audiences find it easier to interpret a log scale. 
C)  On a log scale,equal distances represent equal dollar amounts. 
D)  The axis labels are usually easier to read in log units. 
A)  It helps compare growth in time series of dissimilar magnitude. 
B)  General business audiences find it easier to interpret a log scale. 
C)  On a log scale,equal distances represent equal dollar amounts. 
D)  The axis labels are usually easier to read in log units.

Question 10

This histogram shows Chris's golf scores in his last 77 rounds at Devil's Ridge.Which is not a correct statement?

Accepted Answer

A)  The number of bins is consistent with Sturges' Rule. 
B)  The histogram has a noticeable bimodal shape. 
C)  The modal class is 78 < 80. 
D)  About 15 percent of his scores are in the interval 74 < 76. 
A)  The number of bins is consistent with Sturges' Rule. 
B)  The histogram has a noticeable bimodal shape. 
C)  The modal class is 78 < 80. 
D)  About 15 percent of his scores are in the interval 74 < 76.

Question 11

Stacked dot plots are useful in understanding the association between two paired quantitative variables (X,Y).

Accepted Answer

A) True 
 B)False

Question 12

Which is not a characteristic of using a log scale to display time series data?

Accepted Answer

A)  A log scale helps if we are comparing changes in two time series of dissimilar magnitude. 
B)  General business audiences find it easier to interpret a log scale. 
C)  If you display data on a log scale,equal distances represent equal ratios. 
A)  A log scale helps if we are comparing changes in two time series of dissimilar magnitude. 
B)  General business audiences find it easier to interpret a log scale. 
C)  If you display data on a log scale,equal distances represent equal ratios.

Question 13

Because most data values are on the left,we would say that this dot plot (burglary rates per 100,000 persons in 350 U.S.cities)shows a distribution that is skewed to the left (negatively skewed).

Accepted Answer

A) True 
 B)False

Question 14

Which of the following is least useful in visualizing categorical data?

Accepted Answer

A)  Bar chart 
B)  Pie chart 
C)  Line chart 
D)  Pareto chart 
A)  Bar chart 
B)  Pie chart 
C)  Line chart 
D)  Pareto chart

Question 15

Briefly list strengths and weaknesses of this display.Cite specific principles of good graphs,as well as offering your own general interpretation.

Accepted Answer

No source,no units given,area trick dist

Question 16

Effective summary tables generally:

Accepted Answer

A)  have very detailed column headings and footnotes. 
B)  round their data to three or four significant digits. 
C)  use plenty of heavy vertical lines to separate the columns. 
D)  have the raw data listed in a footnote for clarity. 
A)  have very detailed column headings and footnotes. 
B)  round their data to three or four significant digits. 
C)  use plenty of heavy vertical lines to separate the columns. 
D)  have the raw data listed in a footnote for clarity.

Question 17

Below is a sorted stem-and-leaf diagram for the measured speeds (miles per hour)of 49 randomly chosen vehicles on highway I-80 in Nebraska.What is the highest observed speed?

Accepted Answer

A)  92 
B)  90 
C)  87 
D)  Impossible to tell 
A)  92 
B)  90 
C)  87 
D)  Impossible to tell

Question 18

Below is a frequency distribution of earnings of 50 contractors in a country.   Regarding this distribution,which of the following is correct?

Accepted Answer

A)  The frequency distribution contains too many class intervals. 
B)  The class interval limits are ambiguous. 
C)  Too few classes were chosen. 
D)  The class intervals are too wide. 
A)  The frequency distribution contains too many class intervals. 
B)  The class interval limits are ambiguous. 
C)  Too few classes were chosen. 
D)  The class intervals are too wide.

Question 19

Below is a sorted stem-and-leaf diagram for the measured speeds (miles per hour)of 49 randomly chosen vehicles on highway I-80 in Nebraska.What is the mode?

Accepted Answer

A)  62 
B)  79 
C)  65 
D)  Impossible to tell 
A)  62 
B)  79 
C)  65 
D)  Impossible to tell

Question 20

Which is not a poor graphing technique?

Accepted Answer

A)  Gratuitous pictures 
B)  Labeled axis scales 
C)  3D bar charts 
D)  Rotated axis 
A)  Gratuitous pictures 
B)  Labeled axis scales 
C)  3D bar charts 
D)  Rotated axis

Dot plots may not reveal the shape of a distribution when the sample is small.

Which is not a tip for effective line charts?

A pie chart can generally be used instead of a bar chart.

A population has 75 observations.One class interval has a frequency of 15 observations.The relative frequency in this category is:

It is easier to read the data values on a 3D column chart than on a 2D column chart.

Below is a sorted stem-and-leaf diagram for the measured speeds (miles per hour)of 49 randomly chosen vehicles on highway I-80 in Nebraska.The modal class is:

An open-ended bin (e.g. ,"50 and over")might be seen in a frequency distribution when:

Excel's pyramid chart is generally preferred to a bar chart.

Which is a reason for using a log scale for time series data?

This histogram shows Chris's golf scores in his last 77 rounds at Devil's Ridge.Which is not a correct statement?

Stacked dot plots are useful in understanding the association between two paired quantitative variables (X,Y).

Which is not a characteristic of using a log scale to display time series data?

Because most data values are on the left,we would say that this dot plot (burglary rates per 100,000 persons in 350 U.S.cities)shows a distribution that is skewed to the left (negatively skewed).

Which of the following is least useful in visualizing categorical data?

Briefly list strengths and weaknesses of this display.Cite specific principles of good graphs,as well as offering your own general interpretation.

Effective summary tables generally:

Below is a sorted stem-and-leaf diagram for the measured speeds (miles per hour)of 49 randomly chosen vehicles on highway I-80 in Nebraska.What is the highest observed speed?

Below is a frequency distribution of earnings of 50 contractors in a country. Regarding this distribution,which of the following is correct?

Below is a sorted stem-and-leaf diagram for the measured speeds (miles per hour)of 49 randomly chosen vehicles on highway I-80 in Nebraska.What is the mode?

Which is not a poor graphing technique?

Overview of Statistics

Data Collection

Descriptive Statistics

Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions and Estimation

One-Sample Hypothesis Tests

Two-Sample Hypothesis Tests

Analysis of Variance

Simple Regression

Multiple Regression

Time-Series Analysis

Chi-Square Tests

Nonparametric Tests

Quality Management

Filters

Exam 3: Describing Data Visually

Dot plots may not reveal the shape of a distribution when the sample is small.

Which is not a tip for effective line charts?

A pie chart can generally be used instead of a bar chart.

A population has 75 observations.One class interval has a frequency of 15 observations.The relative frequency in this category is:

It is easier to read the data values on a 3D column chart than on a 2D column chart.

Below is a sorted stem-and-leaf diagram for the measured speeds (miles per hour)of 49 randomly chosen vehicles on highway I-80 in Nebraska.The modal class is:

An open-ended bin (e.g. ,"50 and over")might be seen in a frequency distribution when:

Excel's pyramid chart is generally preferred to a bar chart.

Which is a reason for using a log scale for time series data?

This histogram shows Chris's golf scores in his last 77 rounds at Devil's Ridge.Which is not a correct statement?

Stacked dot plots are useful in understanding the association between two paired quantitative variables (X,Y).

Which is not a characteristic of using a log scale to display time series data?

Because most data values are on the left,we would say that this dot plot (burglary rates per 100,000 persons in 350 U.S.cities)shows a distribution that is skewed to the left (negatively skewed).

Which of the following is least useful in visualizing categorical data?

Briefly list strengths and weaknesses of this display.Cite specific principles of good graphs,as well as offering your own general interpretation.

Effective summary tables generally:

Below is a sorted stem-and-leaf diagram for the measured speeds (miles per hour)of 49 randomly chosen vehicles on highway I-80 in Nebraska.What is the highest observed speed?

Below is a frequency distribution of earnings of 50 contractors in a country. Regarding this distribution,which of the following is correct?

Below is a sorted stem-and-leaf diagram for the measured speeds (miles per hour)of 49 randomly chosen vehicles on highway I-80 in Nebraska.What is the mode?

Which is not a poor graphing technique?

Overview of Statistics

Data Collection

Descriptive Statistics

Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions and Estimation

One-Sample Hypothesis Tests

Two-Sample Hypothesis Tests

Analysis of Variance

Simple Regression

Multiple Regression

Time-Series Analysis

Chi-Square Tests

Nonparametric Tests

Quality Management

Filters